Finite Verbs

Finite verbs and non-finite verbs are two broad categories of verbs.

Look at these two groups of sentences.

Group A	Group B
I like to sing songs.	I am fond of eating mangoes.
We like to sing songs.	We are fond of eating mangoes.
You like to sing songs.	You are fond of eating mangoes.
He likes to sing songs.	He is fond of eating mangoes.
She likes to sing songs.	She is fond of eating mangoes.
Anita likes to sing songs.	Antony is fond of eating mangoes.
They like to sing songs.	They are fond of eating mangoes.

In sentences in Group A, we have the verbs like and sing. The verb liketakes on different forms (like, likes) in the six sentences in the group. The verb sing has the same unchangeable form to sing in all the sentences. So, we have one verb which changes and the other which does not change.
In the sentences in Group B, we have a similar thing. We have the verb bein different forms (am, is, are) and the unchangeable verb form eating of the verb eat. So, here too, we have again one changing verb and the other an unchanging verb.

What are Finite Verbs?

The verb like in group A and the verb be in group B are verbs which change. The reason these verbs change their forms must surely be because of the words I, we, you, he, she, Anita, they...since it is clear that all other words within the same group of sentences are the same.
These verbs which change according to words I, we, you, he, she, Anita, andthey, are called Finite Verbs.
The word finite means limited. Since the words I, we, you, he, etc., can make these verbs change, the power of these verbs must be limited indeed! This idea will help us to remember what these verbs are.

What are Non-finite Verbs?

They are verbs which do not change. In group A above, the verb to sing and in group B, the verb eating are non-finite verbs of two different types. No word in a sentence can impose a change on these verbs. I suppose, that is why we call them non-finite, which means not limited by other words in a sentence.
Verbs of this type are...

• the infinitive
• the gerund, and
• the participle.

Are Finite Verbs Necessary?

Yes. Every sentence in English needs such a verb. It is an essential part of a sentence. You may find sentences in which a noun or a pronoun is missing (because it's hidden), but you don't usually find a sentence in which a finite verb is missing.

What are their types?

They may be transitive, intransitive or linking. In a sentence you can have any one of these types.

What is there to learn about them?

About these verbs we need to understand important things like:

• agreement with the subject;
• tense;
• aspect;
• voice; and
• mood.

We can think of these as properties of the verb or as "rules" which finite verbs obey. They are obedient and reliable verbs!
Non-finite verbs are the wayward ones. Though they are born in the verb family, the non-finites often act like nouns, and sometimes like adjectives or adverbs.




referensi :
http://www.english-language-grammar-guide.com/finite-verbs.html